1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2017 Intel Corporation
11 * Wireless base band device abstraction APIs.
14 * @b EXPERIMENTAL: this API may change without prior notice
16 * This API allows an application to discover, configure and use a device to
17 * process operations. An asynchronous API (enqueue, followed by later dequeue)
18 * is used for processing operations.
20 * The functions in this API are not thread-safe when called on the same
21 * target object (a device, or a queue on a device), with the exception that
22 * one thread can enqueue operations to a queue while another thread dequeues
23 * from the same queue.
34 #include <rte_compat.h>
35 #include <rte_atomic.h>
37 #include <rte_cpuflags.h>
38 #include <rte_memory.h>
40 #include "rte_bbdev_op.h"
42 #ifndef RTE_BBDEV_MAX_DEVS
43 #define RTE_BBDEV_MAX_DEVS 128 /**< Max number of devices */
46 /** Flags indiciate current state of BBDEV device */
47 enum rte_bbdev_state {
53 * Get the total number of devices that have been successfully initialised.
56 * The total number of usable devices.
58 uint16_t __rte_experimental
59 rte_bbdev_count(void);
62 * Check if a device is valid.
65 * The identifier of the device.
68 * true if device ID is valid and device is attached, false otherwise.
70 bool __rte_experimental
71 rte_bbdev_is_valid(uint16_t dev_id);
74 * Get the next enabled device.
80 * - The next device, or
81 * - RTE_BBDEV_MAX_DEVS if none found
83 uint16_t __rte_experimental
84 rte_bbdev_find_next(uint16_t dev_id);
86 /** Iterate through all enabled devices */
87 #define RTE_BBDEV_FOREACH(i) for (i = rte_bbdev_find_next(-1); \
88 i < RTE_BBDEV_MAX_DEVS; \
89 i = rte_bbdev_find_next(i))
92 * Setup up device queues.
93 * This function must be called on a device before setting up the queues and
94 * starting the device. It can also be called when a device is in the stopped
95 * state. If any device queues have been configured their configuration will be
96 * cleared by a call to this function.
99 * The identifier of the device.
101 * Number of queues to configure on device.
103 * ID of a socket which will be used to allocate memory.
107 * - -ENODEV if dev_id is invalid or the device is corrupted
108 * - -EINVAL if num_queues is invalid, 0 or greater than maximum
109 * - -EBUSY if the identified device has already started
110 * - -ENOMEM if unable to allocate memory
112 int __rte_experimental
113 rte_bbdev_setup_queues(uint16_t dev_id, uint16_t num_queues, int socket_id);
117 * This function may be called before starting the device to enable the
118 * interrupts if they are available.
121 * The identifier of the device.
125 * - -ENODEV if dev_id is invalid or the device is corrupted
126 * - -EBUSY if the identified device has already started
127 * - -ENOTSUP if the interrupts are not supported by the device
129 int __rte_experimental
130 rte_bbdev_intr_enable(uint16_t dev_id);
132 /** Device queue configuration structure */
133 struct rte_bbdev_queue_conf {
134 int socket; /**< NUMA socket used for memory allocation */
135 uint32_t queue_size; /**< Size of queue */
136 uint8_t priority; /**< Queue priority */
137 bool deferred_start; /**< Do not start queue when device is started. */
138 enum rte_bbdev_op_type op_type; /**< Operation type */
142 * Configure a queue on a device.
143 * This function can be called after device configuration, and before starting.
144 * It can also be called when the device or the queue is in the stopped state.
147 * The identifier of the device.
149 * The index of the queue.
151 * The queue configuration. If NULL, a default configuration will be used.
155 * - EINVAL if the identified queue size or priority are invalid
156 * - EBUSY if the identified queue or its device have already started
158 int __rte_experimental
159 rte_bbdev_queue_configure(uint16_t dev_id, uint16_t queue_id,
160 const struct rte_bbdev_queue_conf *conf);
164 * This is the last step needed before enqueueing operations is possible.
167 * The identifier of the device.
171 * - negative value on failure - as returned from PMD driver
173 int __rte_experimental
174 rte_bbdev_start(uint16_t dev_id);
178 * The device can be reconfigured, and restarted after being stopped.
181 * The identifier of the device.
186 int __rte_experimental
187 rte_bbdev_stop(uint16_t dev_id);
191 * The device cannot be restarted without reconfiguration!
194 * The identifier of the device.
199 int __rte_experimental
200 rte_bbdev_close(uint16_t dev_id);
203 * Start a specified queue on a device.
204 * This is only needed if the queue has been stopped, or if the deferred_start
205 * flag has been set when configuring the queue.
208 * The identifier of the device.
210 * The index of the queue.
214 * - negative value on failure - as returned from PMD driver
216 int __rte_experimental
217 rte_bbdev_queue_start(uint16_t dev_id, uint16_t queue_id);
220 * Stop a specified queue on a device, to allow re configuration.
223 * The identifier of the device.
225 * The index of the queue.
229 * - negative value on failure - as returned from PMD driver
231 int __rte_experimental
232 rte_bbdev_queue_stop(uint16_t dev_id, uint16_t queue_id);
234 /** Device statistics. */
235 struct rte_bbdev_stats {
236 uint64_t enqueued_count; /**< Count of all operations enqueued */
237 uint64_t dequeued_count; /**< Count of all operations dequeued */
238 /** Total error count on operations enqueued */
239 uint64_t enqueue_err_count;
240 /** Total error count on operations dequeued */
241 uint64_t dequeue_err_count;
242 /** CPU cycles consumed by the (HW/SW) accelerator device to offload
243 * the enqueue request to its internal queues.
244 * - For a HW device this is the cycles consumed in MMIO write
245 * - For a SW (vdev) device, this is the processing time of the
248 uint64_t acc_offload_cycles;
252 * Retrieve the general I/O statistics of a device.
255 * The identifier of the device.
257 * Pointer to structure to where statistics will be copied. On error, this
258 * location may or may not have been modified.
262 * - EINVAL if invalid parameter pointer is provided
264 int __rte_experimental
265 rte_bbdev_stats_get(uint16_t dev_id, struct rte_bbdev_stats *stats);
268 * Reset the statistics of a device.
271 * The identifier of the device.
275 int __rte_experimental
276 rte_bbdev_stats_reset(uint16_t dev_id);
278 /** Device information supplied by the device's driver */
279 struct rte_bbdev_driver_info {
281 const char *driver_name;
283 /** Maximum number of queues supported by the device */
284 unsigned int max_num_queues;
285 /** Queue size limit (queue size must also be power of 2) */
286 uint32_t queue_size_lim;
287 /** Set if device off-loads operation to hardware */
288 bool hardware_accelerated;
289 /** Max value supported by queue priority for DL */
290 uint8_t max_dl_queue_priority;
291 /** Max value supported by queue priority for UL */
292 uint8_t max_ul_queue_priority;
293 /** Set if device supports per-queue interrupts */
294 bool queue_intr_supported;
295 /** Minimum alignment of buffers, in bytes */
296 uint16_t min_alignment;
297 /** Default queue configuration used if none is supplied */
298 struct rte_bbdev_queue_conf default_queue_conf;
299 /** Device operation capabilities */
300 const struct rte_bbdev_op_cap *capabilities;
301 /** Device cpu_flag requirements */
302 const enum rte_cpu_flag_t *cpu_flag_reqs;
305 /** Macro used at end of bbdev PMD list */
306 #define RTE_BBDEV_END_OF_CAPABILITIES_LIST() \
307 { RTE_BBDEV_OP_NONE }
310 * Device information structure used by an application to discover a devices
311 * capabilities and current configuration
313 struct rte_bbdev_info {
314 int socket_id; /**< NUMA socket that device is on */
315 const char *dev_name; /**< Unique device name */
316 const struct rte_bus *bus; /**< Bus information */
317 uint16_t num_queues; /**< Number of queues currently configured */
318 bool started; /**< Set if device is currently started */
319 struct rte_bbdev_driver_info drv; /**< Info from device driver */
323 * Retrieve information about a device.
326 * The identifier of the device.
328 * Pointer to structure to where information will be copied. On error, this
329 * location may or may not have been modified.
333 * - EINVAL if invalid parameter pointer is provided
335 int __rte_experimental
336 rte_bbdev_info_get(uint16_t dev_id, struct rte_bbdev_info *dev_info);
338 /** Queue information */
339 struct rte_bbdev_queue_info {
340 /** Current device configuration */
341 struct rte_bbdev_queue_conf conf;
342 /** Set if queue is currently started */
347 * Retrieve information about a specific queue on a device.
350 * The identifier of the device.
352 * The index of the queue.
354 * Pointer to structure to where information will be copied. On error, this
355 * location may or may not have been modified.
359 * - EINVAL if invalid parameter pointer is provided
361 int __rte_experimental
362 rte_bbdev_queue_info_get(uint16_t dev_id, uint16_t queue_id,
363 struct rte_bbdev_queue_info *queue_info);
365 /** @internal The data structure associated with each queue of a device. */
366 struct rte_bbdev_queue_data {
367 void *queue_private; /**< Driver-specific per-queue data */
368 struct rte_bbdev_queue_conf conf; /**< Current configuration */
369 struct rte_bbdev_stats queue_stats; /**< Queue statistics */
370 bool started; /**< Queue state */
373 /** @internal Enqueue encode operations for processing on queue of a device. */
374 typedef uint16_t (*rte_bbdev_enqueue_enc_ops_t)(
375 struct rte_bbdev_queue_data *q_data,
376 struct rte_bbdev_enc_op **ops,
379 /** @internal Enqueue decode operations for processing on queue of a device. */
380 typedef uint16_t (*rte_bbdev_enqueue_dec_ops_t)(
381 struct rte_bbdev_queue_data *q_data,
382 struct rte_bbdev_dec_op **ops,
385 /** @internal Dequeue encode operations from a queue of a device. */
386 typedef uint16_t (*rte_bbdev_dequeue_enc_ops_t)(
387 struct rte_bbdev_queue_data *q_data,
388 struct rte_bbdev_enc_op **ops, uint16_t num);
390 /** @internal Dequeue decode operations from a queue of a device. */
391 typedef uint16_t (*rte_bbdev_dequeue_dec_ops_t)(
392 struct rte_bbdev_queue_data *q_data,
393 struct rte_bbdev_dec_op **ops, uint16_t num);
395 #define RTE_BBDEV_NAME_MAX_LEN 64 /**< Max length of device name */
398 * @internal The data associated with a device, with no function pointers.
399 * This structure is safe to place in shared memory to be common among
400 * different processes in a multi-process configuration. Drivers can access
401 * these fields, but should never write to them!
403 struct rte_bbdev_data {
404 char name[RTE_BBDEV_NAME_MAX_LEN]; /**< Unique identifier name */
405 void *dev_private; /**< Driver-specific private data */
406 uint16_t num_queues; /**< Number of currently configured queues */
407 struct rte_bbdev_queue_data *queues; /**< Queue structures */
408 uint16_t dev_id; /**< Device ID */
409 int socket_id; /**< NUMA socket that device is on */
410 bool started; /**< Device run-time state */
411 /** Counter of processes using the device */
412 rte_atomic16_t process_cnt;
415 /* Forward declarations */
416 struct rte_bbdev_ops;
417 struct rte_bbdev_callback;
418 struct rte_intr_handle;
420 /** Structure to keep track of registered callbacks */
421 TAILQ_HEAD(rte_bbdev_cb_list, rte_bbdev_callback);
424 * @internal The data structure associated with a device. Drivers can access
425 * these fields, but should only write to the *_ops fields.
427 struct __rte_cache_aligned rte_bbdev {
428 /**< Enqueue encode function */
429 rte_bbdev_enqueue_enc_ops_t enqueue_enc_ops;
430 /**< Enqueue decode function */
431 rte_bbdev_enqueue_dec_ops_t enqueue_dec_ops;
432 /**< Dequeue encode function */
433 rte_bbdev_dequeue_enc_ops_t dequeue_enc_ops;
434 /**< Dequeue decode function */
435 rte_bbdev_dequeue_dec_ops_t dequeue_dec_ops;
436 const struct rte_bbdev_ops *dev_ops; /**< Functions exported by PMD */
437 struct rte_bbdev_data *data; /**< Pointer to device data */
438 enum rte_bbdev_state state; /**< If device is currently used or not */
439 struct rte_device *device; /**< Backing device */
440 /** User application callback for interrupts if present */
441 struct rte_bbdev_cb_list list_cbs;
442 struct rte_intr_handle *intr_handle; /**< Device interrupt handle */
445 /** @internal array of all devices */
446 extern struct rte_bbdev rte_bbdev_devices[];
449 * Enqueue a burst of processed encode operations to a queue of the device.
450 * This functions only enqueues as many operations as currently possible and
451 * does not block until @p num_ops entries in the queue are available.
452 * This function does not provide any error notification to avoid the
453 * corresponding overhead.
456 * The identifier of the device.
458 * The index of the queue.
460 * Pointer array containing operations to be enqueued Must have at least
463 * The maximum number of operations to enqueue.
466 * The number of operations actually enqueued (this is the number of processed
467 * entries in the @p ops array).
469 static inline uint16_t __rte_experimental
470 rte_bbdev_enqueue_enc_ops(uint16_t dev_id, uint16_t queue_id,
471 struct rte_bbdev_enc_op **ops, uint16_t num_ops)
473 struct rte_bbdev *dev = &rte_bbdev_devices[dev_id];
474 struct rte_bbdev_queue_data *q_data = &dev->data->queues[queue_id];
475 return dev->enqueue_enc_ops(q_data, ops, num_ops);
479 * Enqueue a burst of processed decode operations to a queue of the device.
480 * This functions only enqueues as many operations as currently possible and
481 * does not block until @p num_ops entries in the queue are available.
482 * This function does not provide any error notification to avoid the
483 * corresponding overhead.
486 * The identifier of the device.
488 * The index of the queue.
490 * Pointer array containing operations to be enqueued Must have at least
493 * The maximum number of operations to enqueue.
496 * The number of operations actually enqueued (this is the number of processed
497 * entries in the @p ops array).
499 static inline uint16_t __rte_experimental
500 rte_bbdev_enqueue_dec_ops(uint16_t dev_id, uint16_t queue_id,
501 struct rte_bbdev_dec_op **ops, uint16_t num_ops)
503 struct rte_bbdev *dev = &rte_bbdev_devices[dev_id];
504 struct rte_bbdev_queue_data *q_data = &dev->data->queues[queue_id];
505 return dev->enqueue_dec_ops(q_data, ops, num_ops);
509 * Dequeue a burst of processed encode operations from a queue of the device.
510 * This functions returns only the current contents of the queue, and does not
511 * block until @ num_ops is available.
512 * This function does not provide any error notification to avoid the
513 * corresponding overhead.
516 * The identifier of the device.
518 * The index of the queue.
520 * Pointer array where operations will be dequeued to. Must have at least
523 * The maximum number of operations to dequeue.
526 * The number of operations actually dequeued (this is the number of entries
527 * copied into the @p ops array).
529 static inline uint16_t __rte_experimental
530 rte_bbdev_dequeue_enc_ops(uint16_t dev_id, uint16_t queue_id,
531 struct rte_bbdev_enc_op **ops, uint16_t num_ops)
533 struct rte_bbdev *dev = &rte_bbdev_devices[dev_id];
534 struct rte_bbdev_queue_data *q_data = &dev->data->queues[queue_id];
535 return dev->dequeue_enc_ops(q_data, ops, num_ops);
539 * Dequeue a burst of processed decode operations from a queue of the device.
540 * This functions returns only the current contents of the queue, and does not
541 * block until @ num_ops is available.
542 * This function does not provide any error notification to avoid the
543 * corresponding overhead.
546 * The identifier of the device.
548 * The index of the queue.
550 * Pointer array where operations will be dequeued to. Must have at least
553 * The maximum number of operations to dequeue.
556 * The number of operations actually dequeued (this is the number of entries
557 * copied into the @p ops array).
560 static inline uint16_t __rte_experimental
561 rte_bbdev_dequeue_dec_ops(uint16_t dev_id, uint16_t queue_id,
562 struct rte_bbdev_dec_op **ops, uint16_t num_ops)
564 struct rte_bbdev *dev = &rte_bbdev_devices[dev_id];
565 struct rte_bbdev_queue_data *q_data = &dev->data->queues[queue_id];
566 return dev->dequeue_dec_ops(q_data, ops, num_ops);
569 /** Definitions of device event types */
570 enum rte_bbdev_event_type {
571 RTE_BBDEV_EVENT_UNKNOWN, /**< unknown event type */
572 RTE_BBDEV_EVENT_ERROR, /**< error interrupt event */
573 RTE_BBDEV_EVENT_DEQUEUE, /**< dequeue event */
574 RTE_BBDEV_EVENT_MAX /**< max value of this enum */
578 * Typedef for application callback function registered by application
579 * software for notification of device events
584 * Device event to register for notification of.
586 * User specified parameter to be passed to user's callback function.
588 * To pass data back to user application.
590 typedef void (*rte_bbdev_cb_fn)(uint16_t dev_id,
591 enum rte_bbdev_event_type event, void *cb_arg,
595 * Register a callback function for specific device id. Multiple callbacks can
596 * be added and will be called in the order they are added when an event is
597 * triggered. Callbacks are called in a separate thread created by the DPDK EAL.
602 * The event that the callback will be registered for.
604 * User supplied callback function to be called.
606 * Pointer to parameter that will be passed to the callback.
609 * Zero on success, negative value on failure.
611 int __rte_experimental
612 rte_bbdev_callback_register(uint16_t dev_id, enum rte_bbdev_event_type event,
613 rte_bbdev_cb_fn cb_fn, void *cb_arg);
616 * Unregister a callback function for specific device id.
619 * The device identifier.
621 * The event that the callback will be unregistered for.
623 * User supplied callback function to be unregistered.
625 * Pointer to the parameter supplied when registering the callback.
626 * (void *)-1 means to remove all registered callbacks with the specified
631 * - EINVAL if invalid parameter pointer is provided
632 * - EAGAIN if the provided callback pointer does not exist
634 int __rte_experimental
635 rte_bbdev_callback_unregister(uint16_t dev_id, enum rte_bbdev_event_type event,
636 rte_bbdev_cb_fn cb_fn, void *cb_arg);
639 * Enable a one-shot interrupt on the next operation enqueued to a particular
640 * queue. The interrupt will be triggered when the operation is ready to be
641 * dequeued. To handle the interrupt, an epoll file descriptor must be
642 * registered using rte_bbdev_queue_intr_ctl(), and then an application
643 * thread/lcore can wait for the interrupt using rte_epoll_wait().
646 * The device identifier.
648 * The index of the queue.
652 * - negative value on failure - as returned from PMD driver
654 int __rte_experimental
655 rte_bbdev_queue_intr_enable(uint16_t dev_id, uint16_t queue_id);
658 * Disable a one-shot interrupt on the next operation enqueued to a particular
659 * queue (if it has been enabled).
662 * The device identifier.
664 * The index of the queue.
668 * - negative value on failure - as returned from PMD driver
670 int __rte_experimental
671 rte_bbdev_queue_intr_disable(uint16_t dev_id, uint16_t queue_id);
674 * Control interface for per-queue interrupts.
677 * The device identifier.
679 * The index of the queue.
681 * Epoll file descriptor that will be associated with the interrupt source.
682 * If the special value RTE_EPOLL_PER_THREAD is provided, a per thread epoll
683 * file descriptor created by the EAL is used (RTE_EPOLL_PER_THREAD can also
684 * be used when calling rte_epoll_wait()).
686 * The operation be performed for the vector.RTE_INTR_EVENT_ADD or
687 * RTE_INTR_EVENT_DEL.
689 * User context, that will be returned in the epdata.data field of the
690 * rte_epoll_event structure filled in by rte_epoll_wait().
694 * - ENOTSUP if interrupts are not supported by the identified device
695 * - negative value on failure - as returned from PMD driver
697 int __rte_experimental
698 rte_bbdev_queue_intr_ctl(uint16_t dev_id, uint16_t queue_id, int epfd, int op,
705 #endif /* _RTE_BBDEV_H_ */